PYTHON:

KInterbasDB is a Python extension package that implements Python Database API 2.0-
compliant support for Firebird. Full native API support for the Firebird client; in stable release and
under active development. BSD open source licence. Downloads and news at
http://kinterbasdb.sourceforge.net/

Delphi and C++Builder:

Users have two powerful alternatives for full, direct connectivity with the
Firebird 1.5 API, both well supported with developer and peer support:

C++:

the freeware C++ access library 'IBPP' (http://www.ibpp.org), MPL license, hosted on
sourceforge.net, fully portable between Win32 and Linux and probably other POSIX platforms. It is
useful when you want low-level C-API kind of access, but with a light C++ abstraction level not bound
to any particular development environment.